Music-recorder.



No. 884,580. PATEN'IED APR. 14, 1908.

W. HBILBRUNN, S. BLUTH & W. PAPE.

. MUSIC RECORDER. APPLIOATION FILED MAY 19. 1905.

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THE NORRIS PETERS col.'wAsHmuraN. D. '1.

I No. 884,580. PATENTED APR. 14, 1908.

W. HEILBRUNN, s. BLUTH & W. PAPEL' MUSIC 88008088.

APPLICATION FILED MAY 19, 1905.

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WOLF HEILBRUNN, SIMON BL'UTH, AND WILHELM. PAPE, OF BERLIN, GERMANY.

MUSIC-RECORDER.

I Specification of Letters l atent.

Patented April 14, 1908.

Applicationfiled May 19, 1905. Serial No. 261,214.

To all whom it may concern:

Be it known that we, WOLF I-IEILBRUNN, SIMON BLtrrn, and WILHELM PAPE,citizens of Germany, residing at 39 Keibelstrasse, Berlin, Germany, haveinvented new and usei ful Improvements in Musicl?tecorders, of which thefollowing is a specification.

Our invention relates to apparatus for pneumatically marking note orrecord sheets for automatic musical instruments while the sheet willenable exact reproduction of the piece of music.

The essential feature of the invention is that the recording point foreach note is actuated directly by a bellows, the interior of which, ondepression of the corresponding key of the instrument, is brought intoconnection with a low pressure chamber, owing to the opening of an airpassage and actuation of a change valve. In this manner extremelyaccurate and simple transmission is attained. A still more rapidsuccession of operations for trilling or shaking or the like can beinsured by the provision of an extra low pressure chamber'communicatingwith the said passages between the key-actuated valve and the changevalve.

Our invention is illustrated in the accompanying drawing, in whichFigure 1 is a front elevation of a portion of a piano to which the newrecorder is attached. Fig. 2 is a section on the line AB of Fig. 1.

a is a portion of a piano on which is mounted an attachment ofwell-known description for winding up and oil the record sheet (1,consisting of the rollers 12 and c, on which the record sheet is wound.This sheet is wholly blank, being provided neither with graphic marksnor perforations. The rollers b 0 may be driven in any suitable manner(preferably electrically) the driving mechanism being ad justedcorresponding to the time of the piece of music to be recorded.

On the sheet d the notes are mechanically recorded in the followingmanner. On the keys 6 being struck, the rear lever-arm f actuates valvesg, whereby the mouth of a I passage h is opened. By the entrance of airinto this passage a diaphragm i will be moved, whereby in Well-knownmanner a change-valve lc is operated. On this valve 76 moving to theleft, it closes the aperture 1 which conducts to the outside, and the interior of the bellowsm is connected with the low pressure chamber a. Thebellows m immediately collapses and the rod q and bell lever 0 press thepencil or other marking point p against the surface of the unwindingsheet (1. As long as the key 6 is depressed. and air has access to thepassage h, the point 29 remains pressed against the unwinding sheet cland thus makes a mark in order that the part can subsequently cut out ofthe sheet. For each key the arrangement is naturally exactly the sameand likewise for the pedals. When the sheet has thus been fully marked,it can be stamped out inwell-known manner, the perforations made beingof exactly the length of the marks made by the point p.

The low pressure in the chambers n is produced by a bellows or the like,from which a flexible pipe 7" conducts to the said chambers.

In order to again suck the atmospheric air out of the various passages hagain, another chamber 8 is provided, connected with the suction bellowsby a flexible pipe t.

Having thus described our invention, what we claim as new and desire tosecure by Letters Patent of the United States is A music recordercomprising in combination for each key, a low pressure chamber having anatmospheric air inlet at one side, a valve for closing said inlet, adiaphragm in the said chamber, a bellows communicating with the chamberat the other side of the diaphragm, a valve controlling thecommunication of the chamber with the bellows and actuated by thediaphragm, a point adapted to mark the traveling record sheet, a bellcrank lever connectedv to said oint and a Witnesses:

HENRY HAsPnR, WOLDEMAR HAUPT.

